Q.
Manganese salt + PbO2 + conc. HNO3 → The solution has a purple colour.The color is due to
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a
HMnO4
b
A lead salt
c
MnNO32
d
H2MnO4
answer is A.
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Detailed Solution
Mn2+ is oxidised to Mn7+ forming HMnO4.
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